deps/protobuf/java/core/src/test/java/com/google/protobuf/MapForProto2Test.java
<filename>deps/protobuf/java/core/src/test/java/com/google/protobuf/MapForProto2Test.java// Protocol Buffers - Google's data interchange format
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package com.google.protobuf;

import com.google.protobuf.Descriptors.FieldDescriptor;
import map_test.MapForProto2TestProto.BizarroTestMap;
import map_test.MapForProto2TestProto.ReservedAsMapField;
import map_test.MapForProto2TestProto.ReservedAsMapFieldWithEnumValue;
import map_test.MapForProto2TestProto.TestMap;
import map_test.MapForProto2TestProto.TestMap.MessageValue;
import map_test.MapForProto2TestProto.TestMap.MessageWithRequiredFields;
import map_test.MapForProto2TestProto.TestMapOrBuilder;
import map_test.MapForProto2TestProto.TestRecursiveMap;
import map_test.MapForProto2TestProto.TestUnknownEnumValue;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import junit.framework.TestCase;

/**
 * Unit tests for map fields in proto2 protos.
 */
public class MapForProto2Test extends TestCase {

  private void setMapValuesUsingMutableMap(TestMap.Builder builder) {
    builder.getMutableInt32ToInt32Field().put(1, 11);
    builder.getMutableInt32ToInt32Field().put(2, 22);
    builder.getMutableInt32ToInt32Field().put(3, 33);
  //
    builder.getMutableInt32ToStringField().put(1, "11");
    builder.getMutableInt32ToStringField().put(2, "22");
    builder.getMutableInt32ToStringField().put(3, "33");
  //
    builder.getMutableInt32ToBytesField().put(1, TestUtil.toBytes("11"));
    builder.getMutableInt32ToBytesField().put(2, TestUtil.toBytes("22"));
    builder.getMutableInt32ToBytesField().put(3, TestUtil.toBytes("33"));
  //
    builder.getMutableInt32ToEnumField().put(1, TestMap.EnumValue.FOO);
    builder.getMutableInt32ToEnumField().put(2, TestMap.EnumValue.BAR);
    builder.getMutableInt32ToEnumField().put(3, TestMap.EnumValue.BAZ);
  //
    builder.getMutableInt32ToMessageField().put(
        1, MessageValue.newBuilder().setValue(11).build());
    builder.getMutableInt32ToMessageField().put(
        2, MessageValue.newBuilder().setValue(22).build());
    builder.getMutableInt32ToMessageField().put(
        3, MessageValue.newBuilder().setValue(33).build());
  //
    builder.getMutableStringToInt32Field().put("1", 11);
    builder.getMutableStringToInt32Field().put("2", 22);
    builder.getMutableStringToInt32Field().put("3", 33);
  }

  private void setMapValuesUsingAccessors(TestMap.Builder builder) {
    builder
        .putInt32ToInt32Field(1, 11)
        .putInt32ToInt32Field(2, 22)
        .putInt32ToInt32Field(3, 33)

        .putInt32ToStringField(1, "11")
        .putInt32ToStringField(2, "22")
        .putInt32ToStringField(3, "33")

        .putInt32ToBytesField(1, TestUtil.toBytes("11"))
        .putInt32ToBytesField(2, TestUtil.toBytes("22"))
        .putInt32ToBytesField(3, TestUtil.toBytes("33"))

        .putInt32ToEnumField(1, TestMap.EnumValue.FOO)
        .putInt32ToEnumField(2, TestMap.EnumValue.BAR)
        .putInt32ToEnumField(3, TestMap.EnumValue.BAZ)

        .putInt32ToMessageField(1, MessageValue.newBuilder().setValue(11).build())
        .putInt32ToMessageField(2, MessageValue.newBuilder().setValue(22).build())
        .putInt32ToMessageField(3, MessageValue.newBuilder().setValue(33).build())

        .putStringToInt32Field("1", 11)
        .putStringToInt32Field("2", 22)
        .putStringToInt32Field("3", 33);
  }

  public void testSetMapValues() {
    TestMap.Builder usingMutableMapBuilder = TestMap.newBuilder();
    setMapValuesUsingMutableMap(usingMutableMapBuilder);
    TestMap usingMutableMap = usingMutableMapBuilder.build();
    assertMapValuesSet(usingMutableMap);

    TestMap.Builder usingAccessorsBuilder = TestMap.newBuilder();
    setMapValuesUsingAccessors(usingAccessorsBuilder);
    TestMap usingAccessors = usingAccessorsBuilder.build();
    assertMapValuesSet(usingAccessors);

    assertEquals(usingAccessors, usingMutableMap);
  }

  private void copyMapValues(TestMap source, TestMap.Builder destination) {
    destination
        .putAllInt32ToInt32Field(source.getInt32ToInt32Field())
        .putAllInt32ToStringField(source.getInt32ToStringField())
        .putAllInt32ToBytesField(source.getInt32ToBytesField())
        .putAllInt32ToEnumField(source.getInt32ToEnumField())
        .putAllInt32ToMessageField(source.getInt32ToMessageField())
        .putAllStringToInt32Field(source.getStringToInt32Field());
  }

  private void assertMapValuesSet(TestMapOrBuilder message) {
    assertEquals(3, message.getInt32ToInt32Field().size());
    assertEquals(11, message.getInt32ToInt32Field().get(1).intValue());
    assertEquals(22, message.getInt32ToInt32Field().get(2).intValue());
    assertEquals(33, message.getInt32ToInt32Field().get(3).intValue());

    assertEquals(3, message.getInt32ToStringField().size());
    assertEquals("11", message.getInt32ToStringField().get(1));
    assertEquals("22", message.getInt32ToStringField().get(2));
    assertEquals("33", message.getInt32ToStringField().get(3));

    assertEquals(3, message.getInt32ToBytesField().size());
    assertEquals(TestUtil.toBytes("11"), message.getInt32ToBytesField().get(1));
    assertEquals(TestUtil.toBytes("22"), message.getInt32ToBytesField().get(2));
    assertEquals(TestUtil.toBytes("33"), message.getInt32ToBytesField().get(3));

    assertEquals(3, message.getInt32ToEnumField().size());
    assertEquals(TestMap.EnumValue.FOO, message.getInt32ToEnumField().get(1));
    assertEquals(TestMap.EnumValue.BAR, message.getInt32ToEnumField().get(2));
    assertEquals(TestMap.EnumValue.BAZ, message.getInt32ToEnumField().get(3));

    assertEquals(3, message.getInt32ToMessageField().size());
    assertEquals(11, message.getInt32ToMessageField().get(1).getValue());
    assertEquals(22, message.getInt32ToMessageField().get(2).getValue());
    assertEquals(33, message.getInt32ToMessageField().get(3).getValue());

    assertEquals(3, message.getStringToInt32Field().size());
    assertEquals(11, message.getStringToInt32Field().get("1").intValue());
    assertEquals(22, message.getStringToInt32Field().get("2").intValue());
    assertEquals(33, message.getStringToInt32Field().get("3").intValue());
  }

  private void updateMapValuesUsingMutableMap(TestMap.Builder builder) {
    builder.getMutableInt32ToInt32Field().put(1, 111);
    builder.getMutableInt32ToInt32Field().remove(2);
    builder.getMutableInt32ToInt32Field().put(4, 44);
  //
    builder.getMutableInt32ToStringField().put(1, "111");
    builder.getMutableInt32ToStringField().remove(2);
    builder.getMutableInt32ToStringField().put(4, "44");
  //
    builder.getMutableInt32ToBytesField().put(1, TestUtil.toBytes("111"));
    builder.getMutableInt32ToBytesField().remove(2);
    builder.getMutableInt32ToBytesField().put(4, TestUtil.toBytes("44"));
  //
    builder.getMutableInt32ToEnumField().put(1, TestMap.EnumValue.BAR);
    builder.getMutableInt32ToEnumField().remove(2);
    builder.getMutableInt32ToEnumField().put(4, TestMap.EnumValue.QUX);
  //
    builder.getMutableInt32ToMessageField().put(
        1, MessageValue.newBuilder().setValue(111).build());
    builder.getMutableInt32ToMessageField().remove(2);
    builder.getMutableInt32ToMessageField().put(
        4, MessageValue.newBuilder().setValue(44).build());
  //
    builder.getMutableStringToInt32Field().put("1", 111);
    builder.getMutableStringToInt32Field().remove("2");
    builder.getMutableStringToInt32Field().put("4", 44);
  }

  private void updateMapValuesUsingAccessors(TestMap.Builder builder) {
    builder
        .putInt32ToInt32Field(1, 111)
        .removeInt32ToInt32Field(2)
        .putInt32ToInt32Field(4, 44)

        .putInt32ToStringField(1, "111")
        .removeInt32ToStringField(2)
        .putInt32ToStringField(4, "44")

        .putInt32ToBytesField(1, TestUtil.toBytes("111"))
        .removeInt32ToBytesField(2)
        .putInt32ToBytesField(4, TestUtil.toBytes("44"))

        .putInt32ToEnumField(1, TestMap.EnumValue.BAR)
        .removeInt32ToEnumField(2)
        .putInt32ToEnumField(4, TestMap.EnumValue.QUX)

        .putInt32ToMessageField(1, MessageValue.newBuilder().setValue(111).build())
        .removeInt32ToMessageField(2)
        .putInt32ToMessageField(4, MessageValue.newBuilder().setValue(44).build())

        .putStringToInt32Field("1", 111)
        .removeStringToInt32Field("2")
        .putStringToInt32Field("4", 44);
  }

  public void testUpdateMapValues() {
    TestMap.Builder usingMutableMapBuilder = TestMap.newBuilder();
    setMapValuesUsingMutableMap(usingMutableMapBuilder);
    TestMap usingMutableMap = usingMutableMapBuilder.build();
    assertMapValuesSet(usingMutableMap);

    TestMap.Builder usingAccessorsBuilder = TestMap.newBuilder();
    setMapValuesUsingAccessors(usingAccessorsBuilder);
    TestMap usingAccessors = usingAccessorsBuilder.build();
    assertMapValuesSet(usingAccessors);

    assertEquals(usingAccessors, usingMutableMap);
    //
    usingMutableMapBuilder = usingMutableMap.toBuilder();
    updateMapValuesUsingMutableMap(usingMutableMapBuilder);
    usingMutableMap = usingMutableMapBuilder.build();
    assertMapValuesUpdated(usingMutableMap);

    usingAccessorsBuilder = usingAccessors.toBuilder();
    updateMapValuesUsingAccessors(usingAccessorsBuilder);
    usingAccessors = usingAccessorsBuilder.build();
    assertMapValuesUpdated(usingAccessors);

    assertEquals(usingAccessors, usingMutableMap);
  }

  private void assertMapValuesUpdated(TestMap message) {
    assertEquals(3, message.getInt32ToInt32Field().size());
    assertEquals(111, message.getInt32ToInt32Field().get(1).intValue());
    assertEquals(33, message.getInt32ToInt32Field().get(3).intValue());
    assertEquals(44, message.getInt32ToInt32Field().get(4).intValue());

    assertEquals(3, message.getInt32ToStringField().size());
    assertEquals("111", message.getInt32ToStringField().get(1));
    assertEquals("33", message.getInt32ToStringField().get(3));
    assertEquals("44", message.getInt32ToStringField().get(4));

    assertEquals(3, message.getInt32ToBytesField().size());
    assertEquals(TestUtil.toBytes("111"), message.getInt32ToBytesField().get(1));
    assertEquals(TestUtil.toBytes("33"), message.getInt32ToBytesField().get(3));
    assertEquals(TestUtil.toBytes("44"), message.getInt32ToBytesField().get(4));

    assertEquals(3, message.getInt32ToEnumField().size());
    assertEquals(TestMap.EnumValue.BAR, message.getInt32ToEnumField().get(1));
    assertEquals(TestMap.EnumValue.BAZ, message.getInt32ToEnumField().get(3));
    assertEquals(TestMap.EnumValue.QUX, message.getInt32ToEnumField().get(4));

    assertEquals(3, message.getInt32ToMessageField().size());
    assertEquals(111, message.getInt32ToMessageField().get(1).getValue());
    assertEquals(33, message.getInt32ToMessageField().get(3).getValue());
    assertEquals(44, message.getInt32ToMessageField().get(4).getValue());

    assertEquals(3, message.getStringToInt32Field().size());
    assertEquals(111, message.getStringToInt32Field().get("1").intValue());
    assertEquals(33, message.getStringToInt32Field().get("3").intValue());
    assertEquals(44, message.getStringToInt32Field().get("4").intValue());
  }

  private void assertMapValuesCleared(TestMapOrBuilder testMapOrBuilder) {
    assertEquals(0, testMapOrBuilder.getInt32ToInt32Field().size());
    assertEquals(0, testMapOrBuilder.getInt32ToInt32FieldCount());
    assertEquals(0, testMapOrBuilder.getInt32ToStringField().size());
    assertEquals(0, testMapOrBuilder.getInt32ToStringFieldCount());
    assertEquals(0, testMapOrBuilder.getInt32ToBytesField().size());
    assertEquals(0, testMapOrBuilder.getInt32ToBytesFieldCount());
    assertEquals(0, testMapOrBuilder.getInt32ToEnumField().size());
    assertEquals(0, testMapOrBuilder.getInt32ToEnumFieldCount());
    assertEquals(0, testMapOrBuilder.getInt32ToMessageField().size());
    assertEquals(0, testMapOrBuilder.getInt32ToMessageFieldCount());
    assertEquals(0, testMapOrBuilder.getStringToInt32Field().size());
    assertEquals(0, testMapOrBuilder.getStringToInt32FieldCount());
  }

  public void testGetMapIsImmutable() {
    TestMap.Builder builder = TestMap.newBuilder();
    assertMapsAreImmutable(builder);
    assertMapsAreImmutable(builder.build());

    setMapValuesUsingAccessors(builder);
    assertMapsAreImmutable(builder);
    assertMapsAreImmutable(builder.build());
  }

  private void assertMapsAreImmutable(TestMapOrBuilder testMapOrBuilder) {
    assertImmutable(testMapOrBuilder.getInt32ToInt32Field(), 1, 2);
    assertImmutable(testMapOrBuilder.getInt32ToStringField(), 1, "2");
    assertImmutable(testMapOrBuilder.getInt32ToBytesField(), 1, TestUtil.toBytes("2"));
    assertImmutable(testMapOrBuilder.getInt32ToEnumField(), 1, TestMap.EnumValue.FOO);
    assertImmutable(
        testMapOrBuilder.getInt32ToMessageField(), 1, MessageValue.getDefaultInstance());
    assertImmutable(testMapOrBuilder.getStringToInt32Field(), "1", 2);
  }

  private <K, V> void assertImmutable(Map<K, V> map, K key, V value) {
    try {
      map.put(key, value);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
  }

  public void testMutableMapLifecycle() {
    TestMap.Builder builder = TestMap.newBuilder();
    Map<Integer, Integer> intMap = builder.getMutableInt32ToInt32Field();
    intMap.put(1, 2);
    assertEquals(newMap(1, 2), builder.build().getInt32ToInt32Field());
    try {
      intMap.put(2, 3);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    assertEquals(newMap(1, 2), builder.getInt32ToInt32Field());
    builder.getMutableInt32ToInt32Field().put(2, 3);
    assertEquals(newMap(1, 2, 2, 3), builder.getInt32ToInt32Field());
 //
    Map<Integer, TestMap.EnumValue> enumMap = builder.getMutableInt32ToEnumField();
    enumMap.put(1, TestMap.EnumValue.BAR);
    assertEquals(newMap(1, TestMap.EnumValue.BAR), builder.build().getInt32ToEnumField());
    try {
      enumMap.put(2, TestMap.EnumValue.FOO);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    assertEquals(newMap(1, TestMap.EnumValue.BAR), builder.getInt32ToEnumField());
    builder.getMutableInt32ToEnumField().put(2, TestMap.EnumValue.FOO);
    assertEquals(
        newMap(1, TestMap.EnumValue.BAR, 2, TestMap.EnumValue.FOO),
        builder.getInt32ToEnumField());
  //
    Map<Integer, String> stringMap = builder.getMutableInt32ToStringField();
    stringMap.put(1, "1");
    assertEquals(newMap(1, "1"), builder.build().getInt32ToStringField());
    try {
      stringMap.put(2, "2");
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    assertEquals(newMap(1, "1"), builder.getInt32ToStringField());
    builder.getMutableInt32ToStringField().put(2, "2");
    assertEquals(
        newMap(1, "1", 2, "2"),
        builder.getInt32ToStringField());
  //
    Map<Integer, TestMap.MessageValue> messageMap = builder.getMutableInt32ToMessageField();
    messageMap.put(1, TestMap.MessageValue.getDefaultInstance());
    assertEquals(newMap(1, TestMap.MessageValue.getDefaultInstance()),
        builder.build().getInt32ToMessageField());
    try {
      messageMap.put(2, TestMap.MessageValue.getDefaultInstance());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    assertEquals(newMap(1, TestMap.MessageValue.getDefaultInstance()),
        builder.getInt32ToMessageField());
    builder.getMutableInt32ToMessageField().put(2, TestMap.MessageValue.getDefaultInstance());
    assertEquals(
        newMap(1, TestMap.MessageValue.getDefaultInstance(),
            2, TestMap.MessageValue.getDefaultInstance()),
        builder.getInt32ToMessageField());
  }
  //
  public void testMutableMapLifecycle_collections() {
    TestMap.Builder builder = TestMap.newBuilder();
    Map<Integer, Integer> intMap = builder.getMutableInt32ToInt32Field();
    intMap.put(1, 2);
    assertEquals(newMap(1, 2), builder.build().getInt32ToInt32Field());
    try {
      intMap.remove(2);
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    try {
      intMap.entrySet().remove(new Object());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    try {
      intMap.entrySet().iterator().remove();
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    try {
      intMap.keySet().remove(new Object());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    try {
      intMap.values().remove(new Object());
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    try {
      intMap.values().iterator().remove();
      fail();
    } catch (UnsupportedOperationException e) {
      // expected
    }
    assertEquals(newMap(1, 2), intMap);
    assertEquals(newMap(1, 2), builder.getInt32ToInt32Field());
    assertEquals(newMap(1, 2), builder.build().getInt32ToInt32Field());
  }


  public void testGettersAndSetters() throws Exception {
    TestMap.Builder builder = TestMap.newBuilder();
    TestMap message = builder.build();
    assertMapValuesCleared(message);

    builder = message.toBuilder();
    setMapValuesUsingAccessors(builder);
    message = builder.build();
    assertMapValuesSet(message);

    builder = message.toBuilder();
    updateMapValuesUsingAccessors(builder);
    message = builder.build();
    assertMapValuesUpdated(message);

    builder = message.toBuilder();
    builder.clear();
    assertMapValuesCleared(builder);
    message = builder.build();
    assertMapValuesCleared(message);
  }

  public void testPutAll() throws Exception {
    TestMap.Builder sourceBuilder = TestMap.newBuilder();
    setMapValuesUsingAccessors(sourceBuilder);
    TestMap source = sourceBuilder.build();
    assertMapValuesSet(source);

    TestMap.Builder destination = TestMap.newBuilder();
    copyMapValues(source, destination);
    assertMapValuesSet(destination.build());

    assertEquals(3, destination.getInt32ToEnumFieldCount());
  }

  public void testPutChecksNullKeysAndValues() throws Exception {
    TestMap.Builder builder = TestMap.newBuilder();

    try {
      builder.putInt32ToStringField(1, null);
      fail();
    } catch (NullPointerException e) {
      // expected.
    }

    try {
      builder.putInt32ToBytesField(1, null);
      fail();
    } catch (NullPointerException e) {
      // expected.
    }

    try {
      builder.putInt32ToEnumField(1, null);
      fail();
    } catch (NullPointerException e) {
      // expected.
    }

    try {
      builder.putInt32ToMessageField(1, null);
      fail();
    } catch (NullPointerException e) {
      // expected.
    }

    try {
      builder.putStringToInt32Field(null, 1);
      fail();
    } catch (NullPointerException e) {
      // expected.
    }
  }

  public void testSerializeAndParse() throws Exception {
    TestMap.Builder builder = TestMap.newBuilder();
    setMapValuesUsingAccessors(builder);
    TestMap message = builder.build();
    assertEquals(message.getSerializedSize(), message.toByteString().size());
    message = TestMap.parser().parseFrom(message.toByteString());
    assertMapValuesSet(message);

    builder = message.toBuilder();
    updateMapValuesUsingAccessors(builder);
    message = builder.build();
    assertEquals(message.getSerializedSize(), message.toByteString().size());
    message = TestMap.parser().parseFrom(message.toByteString());
    assertMapValuesUpdated(message);

    builder = message.toBuilder();
    builder.clear();
    message = builder.build();
    assertEquals(message.getSerializedSize(), message.toByteString().size());
    message = TestMap.parser().parseFrom(message.toByteString());
    assertMapValuesCleared(message);
  }

  private TestMap tryParseTestMap(BizarroTestMap bizarroMap) throws IOException {
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    CodedOutputStream output = CodedOutputStream.newInstance(byteArrayOutputStream);
    bizarroMap.writeTo(output);
    output.flush();
    return TestMap.parser().parseFrom(ByteString.copyFrom(byteArrayOutputStream.toByteArray()));
  }

  public void testParseError() throws Exception {
    ByteString bytes = TestUtil.toBytes("SOME BYTES");
    String stringKey = "a string key";

    TestMap map = tryParseTestMap(BizarroTestMap.newBuilder()
        .putInt32ToInt32Field(5, bytes)
        .build());
    assertEquals(map.getInt32ToInt32FieldOrDefault(5, -1), 0);

    map = tryParseTestMap(BizarroTestMap.newBuilder()
        .putInt32ToStringField(stringKey, 5)
        .build());
    assertEquals(map.getInt32ToStringFieldOrDefault(0, null), "");

    map = tryParseTestMap(BizarroTestMap.newBuilder()
        .putInt32ToBytesField(stringKey, 5)
        .build());
    assertEquals(map.getInt32ToBytesFieldOrDefault(0, null), ByteString.EMPTY);

    map = tryParseTestMap(BizarroTestMap.newBuilder()
        .putInt32ToEnumField(stringKey, bytes)
        .build());
    assertEquals(map.getInt32ToEnumFieldOrDefault(0, null), TestMap.EnumValue.FOO);

    try {
      tryParseTestMap(BizarroTestMap.newBuilder()
          .putInt32ToMessageField(stringKey, bytes)
          .build());
      fail();
    } catch (InvalidProtocolBufferException expected) {
      assertTrue(expected.getUnfinishedMessage() instanceof TestMap);
      map = (TestMap) expected.getUnfinishedMessage();
      assertTrue(map.getInt32ToMessageField().isEmpty());
    }

    map = tryParseTestMap(BizarroTestMap.newBuilder()
        .putStringToInt32Field(stringKey, bytes)
        .build());
    assertEquals(map.getStringToInt32FieldOrDefault(stringKey, -1), 0);
  }

  public void testMergeFrom() throws Exception {
    TestMap.Builder builder = TestMap.newBuilder();
    setMapValuesUsingAccessors(builder);
    TestMap message = builder.build();

    TestMap.Builder other = TestMap.newBuilder();
    other.mergeFrom(message);
    assertMapValuesSet(other.build());
  }

  public void testEqualsAndHashCode() throws Exception {
    // Test that generated equals() and hashCode() will disregard the order
    // of map entries when comparing/hashing map fields.

    // We can't control the order of elements in a HashMap. The best we can do
    // here is to add elements in different order.
    TestMap.Builder b1 = TestMap.newBuilder();
    b1.putInt32ToInt32Field(1, 2);
    b1.putInt32ToInt32Field(3, 4);
    b1.putInt32ToInt32Field(5, 6);
    TestMap m1 = b1.build();

    TestMap.Builder b2 = TestMap.newBuilder();
    b2.putInt32ToInt32Field(5, 6);
    b2.putInt32ToInt32Field(1, 2);
    b2.putInt32ToInt32Field(3, 4);
    TestMap m2 = b2.build();

    assertEquals(m1, m2);
    assertEquals(m1.hashCode(), m2.hashCode());

    // Make sure we did compare map fields.
    b2.putInt32ToInt32Field(1, 0);
    m2 = b2.build();
    assertFalse(m1.equals(m2));
    // Don't check m1.hashCode() != m2.hashCode() because it's not guaranteed
    // to be different.
  }


  // The following methods are used to test reflection API.

  private static FieldDescriptor f(String name) {
    return TestMap.getDescriptor().findFieldByName(name);
  }

  private static Object getFieldValue(Message mapEntry, String name) {
    FieldDescriptor field = mapEntry.getDescriptorForType().findFieldByName(name);
    return mapEntry.getField(field);
  }

  private static Message.Builder setFieldValue(
      Message.Builder mapEntry, String name, Object value) {
    FieldDescriptor field = mapEntry.getDescriptorForType().findFieldByName(name);
    mapEntry.setField(field, value);
    return mapEntry;
  }

  private static void assertHasMapValues(Message message, String name, Map<?, ?> values) {
    FieldDescriptor field = f(name);
    for (Object entry : (List<?>) message.getField(field)) {
      Message mapEntry = (Message) entry;
      Object key = getFieldValue(mapEntry, "key");
      Object value = getFieldValue(mapEntry, "value");
      assertTrue(values.containsKey(key));
      assertEquals(value, values.get(key));
    }
    assertEquals(values.size(), message.getRepeatedFieldCount(field));
    for (int i = 0; i < message.getRepeatedFieldCount(field); i++) {
      Message mapEntry = (Message) message.getRepeatedField(field, i);
      Object key = getFieldValue(mapEntry, "key");
      Object value = getFieldValue(mapEntry, "value");
      assertTrue(values.containsKey(key));
      assertEquals(value, values.get(key));
    }
  }

  private static <KeyType, ValueType>
  Message newMapEntry(Message.Builder builder, String name, KeyType key, ValueType value) {
    FieldDescriptor field = builder.getDescriptorForType().findFieldByName(name);
    Message.Builder entryBuilder = builder.newBuilderForField(field);
    FieldDescriptor keyField = entryBuilder.getDescriptorForType().findFieldByName("key");
    FieldDescriptor valueField = entryBuilder.getDescriptorForType().findFieldByName("value");
    entryBuilder.setField(keyField, key);
    entryBuilder.setField(valueField, value);
    return entryBuilder.build();
  }

  private static void setMapValues(Message.Builder builder, String name, Map<?, ?> values) {
    List<Message> entryList = new ArrayList<Message>();
    for (Map.Entry<?, ?> entry : values.entrySet()) {
      entryList.add(newMapEntry(builder, name, entry.getKey(), entry.getValue()));
    }
    FieldDescriptor field = builder.getDescriptorForType().findFieldByName(name);
    builder.setField(field, entryList);
  }

  private static <KeyType, ValueType> Map<KeyType, ValueType> mapForValues(
      KeyType key1, ValueType value1, KeyType key2, ValueType value2) {
    Map<KeyType, ValueType> map = new HashMap<KeyType, ValueType>();
    map.put(key1, value1);
    map.put(key2, value2);
    return map;
  }

  public void testReflectionApi() throws Exception {
    // In reflection API, map fields are just repeated message fields.
    TestMap.Builder builder = TestMap.newBuilder()
        .putInt32ToInt32Field(1, 2)
        .putInt32ToInt32Field(3, 4)
        .putInt32ToMessageField(11, MessageValue.newBuilder().setValue(22).build())
        .putInt32ToMessageField(33, MessageValue.newBuilder().setValue(44).build());
    TestMap message = builder.build();

    // Test getField(), getRepeatedFieldCount(), getRepeatedField().
    assertHasMapValues(message, "int32_to_int32_field",
        mapForValues(1, 2, 3, 4));
    assertHasMapValues(message, "int32_to_message_field",
        mapForValues(
            11, MessageValue.newBuilder().setValue(22).build(),
            33, MessageValue.newBuilder().setValue(44).build()));

    // Test clearField()
    builder.clearField(f("int32_to_int32_field"));
    builder.clearField(f("int32_to_message_field"));
    message = builder.build();
    assertEquals(0, message.getInt32ToInt32Field().size());
    assertEquals(0, message.getInt32ToMessageField().size());

    // Test setField()
    setMapValues(builder, "int32_to_int32_field",
        mapForValues(11, 22, 33, 44));
    setMapValues(builder, "int32_to_message_field",
        mapForValues(
            111, MessageValue.newBuilder().setValue(222).build(),
            333, MessageValue.newBuilder().setValue(444).build()));
    message = builder.build();
    assertEquals(22, message.getInt32ToInt32Field().get(11).intValue());
    assertEquals(44, message.getInt32ToInt32Field().get(33).intValue());
    assertEquals(222, message.getInt32ToMessageField().get(111).getValue());
    assertEquals(444, message.getInt32ToMessageField().get(333).getValue());

    // Test addRepeatedField
    builder.addRepeatedField(f("int32_to_int32_field"),
        newMapEntry(builder, "int32_to_int32_field", 55, 66));
    builder.addRepeatedField(f("int32_to_message_field"),
        newMapEntry(builder, "int32_to_message_field", 555,
            MessageValue.newBuilder().setValue(666).build()));
    message = builder.build();
    assertEquals(66, message.getInt32ToInt32Field().get(55).intValue());
    assertEquals(666, message.getInt32ToMessageField().get(555).getValue());

    // Test addRepeatedField (overriding existing values)
    builder.addRepeatedField(f("int32_to_int32_field"),
        newMapEntry(builder, "int32_to_int32_field", 55, 55));
    builder.addRepeatedField(f("int32_to_message_field"),
        newMapEntry(builder, "int32_to_message_field", 555,
            MessageValue.newBuilder().setValue(555).build()));
    message = builder.build();
    assertEquals(55, message.getInt32ToInt32Field().get(55).intValue());
    assertEquals(555, message.getInt32ToMessageField().get(555).getValue());

    // Test setRepeatedField
    for (int i = 0; i < builder.getRepeatedFieldCount(f("int32_to_int32_field")); i++) {
      Message mapEntry = (Message) builder.getRepeatedField(f("int32_to_int32_field"), i);
      int oldKey = ((Integer) getFieldValue(mapEntry, "key")).intValue();
      int oldValue = ((Integer) getFieldValue(mapEntry, "value")).intValue();
      // Swap key with value for each entry.
      Message.Builder mapEntryBuilder = mapEntry.toBuilder();
      setFieldValue(mapEntryBuilder, "key", oldValue);
      setFieldValue(mapEntryBuilder, "value", oldKey);
      builder.setRepeatedField(f("int32_to_int32_field"), i, mapEntryBuilder.build());
    }
    message = builder.build();
    assertEquals(11, message.getInt32ToInt32Field().get(22).intValue());
    assertEquals(33, message.getInt32ToInt32Field().get(44).intValue());
    assertEquals(55, message.getInt32ToInt32Field().get(55).intValue());
  }

  // See additional coverage in TextFormatTest.java.
  public void testTextFormat() throws Exception {
    TestMap.Builder builder = TestMap.newBuilder();
    setMapValuesUsingAccessors(builder);
    TestMap message = builder.build();

    String textData = TextFormat.printToString(message);

    builder = TestMap.newBuilder();
    TextFormat.merge(textData, builder);
    message = builder.build();

    assertMapValuesSet(message);
  }

  public void testDynamicMessage() throws Exception {
    TestMap.Builder builder = TestMap.newBuilder();
    setMapValuesUsingAccessors(builder);
    TestMap message = builder.build();

    Message dynamicDefaultInstance =
        DynamicMessage.getDefaultInstance(TestMap.getDescriptor());
    Message dynamicMessage = dynamicDefaultInstance
        .newBuilderForType().mergeFrom(message.toByteString()).build();

    assertEquals(message, dynamicMessage);
    assertEquals(message.hashCode(), dynamicMessage.hashCode());
  }

  public void testReflectionEqualsAndHashCode() throws Exception {
    // Test that generated equals() and hashCode() will disregard the order
    // of map entries when comparing/hashing map fields.

    // We use DynamicMessage to test reflection based equals()/hashCode().
    Message dynamicDefaultInstance =
        DynamicMessage.getDefaultInstance(TestMap.getDescriptor());
    FieldDescriptor field = f("int32_to_int32_field");

    Message.Builder b1 = dynamicDefaultInstance.newBuilderForType();
    b1.addRepeatedField(field, newMapEntry(b1, "int32_to_int32_field", 1, 2));
    b1.addRepeatedField(field, newMapEntry(b1, "int32_to_int32_field", 3, 4));
    b1.addRepeatedField(field, newMapEntry(b1, "int32_to_int32_field", 5, 6));
    Message m1 = b1.build();

    Message.Builder b2 = dynamicDefaultInstance.newBuilderForType();
    b2.addRepeatedField(field, newMapEntry(b2, "int32_to_int32_field", 5, 6));
    b2.addRepeatedField(field, newMapEntry(b2, "int32_to_int32_field", 1, 2));
    b2.addRepeatedField(field, newMapEntry(b2, "int32_to_int32_field", 3, 4));
    Message m2 = b2.build();

    assertEquals(m1, m2);
    assertEquals(m1.hashCode(), m2.hashCode());

    // Make sure we did compare map fields.
    b2.setRepeatedField(field, 0, newMapEntry(b1, "int32_to_int32_field", 0, 0));
    m2 = b2.build();
    assertFalse(m1.equals(m2));
    // Don't check m1.hashCode() != m2.hashCode() because it's not guaranteed
    // to be different.
  }

  public void testUnknownEnumValues() throws Exception {
    TestUnknownEnumValue.Builder builder = TestUnknownEnumValue.newBuilder()
        .putInt32ToInt32Field(1, 1)
        .putInt32ToInt32Field(2, 54321);
    ByteString data = builder.build().toByteString();

    TestMap message = TestMap.parseFrom(data);
    // Entries with unknown enum values will be stored into UnknownFieldSet so
    // there is only one entry in the map.
    assertEquals(1, message.getInt32ToEnumField().size());
    assertEquals(TestMap.EnumValue.BAR, message.getInt32ToEnumField().get(1));
    // UnknownFieldSet should not be empty.
    assertFalse(message.getUnknownFields().asMap().isEmpty());
    // Serializing and parsing should preserve the unknown entry.
    data = message.toByteString();
    TestUnknownEnumValue messageWithUnknownEnums =
        TestUnknownEnumValue.parseFrom(data);
    assertEquals(2, messageWithUnknownEnums.getInt32ToInt32Field().size());
    assertEquals(1, messageWithUnknownEnums.getInt32ToInt32Field().get(1).intValue());
    assertEquals(54321, messageWithUnknownEnums.getInt32ToInt32Field().get(2).intValue());
  }

  public void testRequiredMessage() throws Exception {
    TestMap.Builder builder = TestMap.newBuilder();
    builder.putRequiredMessageMap(0, MessageWithRequiredFields.newBuilder().buildPartial());
    TestMap message = builder.buildPartial();
    assertFalse(message.isInitialized());

    builder.putRequiredMessageMap(0, MessageWithRequiredFields.newBuilder().setValue(1).build());
    message = builder.build();
    assertTrue(message.isInitialized());
  }

  public void testRecursiveMap() throws Exception {
    TestRecursiveMap.Builder builder = TestRecursiveMap.newBuilder();
    builder.putRecursiveMapField(1, TestRecursiveMap.newBuilder().setValue(2).build());
    builder.putRecursiveMapField(3, TestRecursiveMap.newBuilder().setValue(4).build());
    ByteString data = builder.build().toByteString();

    TestRecursiveMap message = TestRecursiveMap.parseFrom(data);
    assertEquals(2, message.getRecursiveMapField().get(1).getValue());
    assertEquals(4, message.getRecursiveMapField().get(3).getValue());
  }

  public void testIterationOrder() throws Exception {
    TestMap.Builder builder = TestMap.newBuilder();
    setMapValuesUsingAccessors(builder);
    TestMap message = builder.build();

    assertEquals(Arrays.asList("1", "2", "3"),
        new ArrayList<String>(message.getStringToInt32Field().keySet()));
  }

  public void testContains() {
    TestMap.Builder builder = TestMap.newBuilder();
    setMapValuesUsingAccessors(builder);
    assertMapContainsSetValues(builder);
    assertMapContainsSetValues(builder.build());
  }

  private void assertMapContainsSetValues(TestMapOrBuilder testMapOrBuilder) {
    assertTrue(testMapOrBuilder.containsInt32ToInt32Field(1));
    assertTrue(testMapOrBuilder.containsInt32ToInt32Field(2));
    assertTrue(testMapOrBuilder.containsInt32ToInt32Field(3));
    assertFalse(testMapOrBuilder.containsInt32ToInt32Field(-1));

    assertTrue(testMapOrBuilder.containsInt32ToStringField(1));
    assertTrue(testMapOrBuilder.containsInt32ToStringField(2));
    assertTrue(testMapOrBuilder.containsInt32ToStringField(3));
    assertFalse(testMapOrBuilder.containsInt32ToStringField(-1));

    assertTrue(testMapOrBuilder.containsInt32ToBytesField(1));
    assertTrue(testMapOrBuilder.containsInt32ToBytesField(2));
    assertTrue(testMapOrBuilder.containsInt32ToBytesField(3));
    assertFalse(testMapOrBuilder.containsInt32ToBytesField(-1));

    assertTrue(testMapOrBuilder.containsInt32ToEnumField(1));
    assertTrue(testMapOrBuilder.containsInt32ToEnumField(2));
    assertTrue(testMapOrBuilder.containsInt32ToEnumField(3));
    assertFalse(testMapOrBuilder.containsInt32ToEnumField(-1));

    assertTrue(testMapOrBuilder.containsInt32ToMessageField(1));
    assertTrue(testMapOrBuilder.containsInt32ToMessageField(2));
    assertTrue(testMapOrBuilder.containsInt32ToMessageField(3));
    assertFalse(testMapOrBuilder.containsInt32ToMessageField(-1));

    assertTrue(testMapOrBuilder.containsStringToInt32Field("1"));
    assertTrue(testMapOrBuilder.containsStringToInt32Field("2"));
    assertTrue(testMapOrBuilder.containsStringToInt32Field("3"));
    assertFalse(testMapOrBuilder.containsStringToInt32Field("-1"));
  }

  public void testCount() {
    TestMap.Builder builder = TestMap.newBuilder();
    assertMapCounts(0, builder);

    setMapValuesUsingAccessors(builder);
    assertMapCounts(3, builder);

    TestMap message = builder.build();
    assertMapCounts(3, message);

    builder = message.toBuilder().putInt32ToInt32Field(4, 44);
    assertEquals(4, builder.getInt32ToInt32FieldCount());
    assertEquals(4, builder.build().getInt32ToInt32FieldCount());

    // already present - should be unchanged
    builder.putInt32ToInt32Field(4, 44);
    assertEquals(4, builder.getInt32ToInt32FieldCount());
  }

  private void assertMapCounts(int expectedCount, TestMapOrBuilder testMapOrBuilder) {
    assertEquals(expectedCount, testMapOrBuilder.getInt32ToInt32FieldCount());
    assertEquals(expectedCount, testMapOrBuilder.getInt32ToStringFieldCount());
    assertEquals(expectedCount, testMapOrBuilder.getInt32ToBytesFieldCount());
    assertEquals(expectedCount, testMapOrBuilder.getInt32ToEnumFieldCount());
    assertEquals(expectedCount, testMapOrBuilder.getInt32ToMessageFieldCount());
    assertEquals(expectedCount, testMapOrBuilder.getStringToInt32FieldCount());
  }

  public void testGetOrDefault() {
    TestMap.Builder builder = TestMap.newBuilder();
    assertMapCounts(0, builder);
    setMapValuesUsingAccessors(builder);
    doTestGetOrDefault(builder);
    doTestGetOrDefault(builder.build());
  }

  public void doTestGetOrDefault(TestMapOrBuilder testMapOrBuilder) {
    assertEquals(11, testMapOrBuilder.getInt32ToInt32FieldOrDefault(1, -11));
    assertEquals(-11, testMapOrBuilder.getInt32ToInt32FieldOrDefault(-1, -11));

    assertEquals("11", testMapOrBuilder.getInt32ToStringFieldOrDefault(1, "-11"));
    assertNull("-11", testMapOrBuilder.getInt32ToStringFieldOrDefault(-1, null));

    assertEquals(TestUtil.toBytes("11"), testMapOrBuilder.getInt32ToBytesFieldOrDefault(1, null));
    assertNull(testMapOrBuilder.getInt32ToBytesFieldOrDefault(-1, null));

    assertEquals(TestMap.EnumValue.FOO, testMapOrBuilder.getInt32ToEnumFieldOrDefault(1, null));
    assertNull(testMapOrBuilder.getInt32ToEnumFieldOrDefault(-1, null));

    assertEquals(MessageValue.newBuilder().setValue(11).build(),
        testMapOrBuilder.getInt32ToMessageFieldOrDefault(1, null));
    assertNull(testMapOrBuilder.getInt32ToMessageFieldOrDefault(-1, null));

    assertEquals(11, testMapOrBuilder.getStringToInt32FieldOrDefault("1", -11));
    assertEquals(-11, testMapOrBuilder.getStringToInt32FieldOrDefault("-1", -11));

    try {
      testMapOrBuilder.getStringToInt32FieldOrDefault(null, -11);
      fail();
    } catch (NullPointerException e) {
      // expected
    }
  }

  public void testGetOrThrow() {
    TestMap.Builder builder = TestMap.newBuilder();
    assertMapCounts(0, builder);
    setMapValuesUsingAccessors(builder);
    doTestGetOrDefault(builder);
    doTestGetOrDefault(builder.build());
  }

  public void doTestGetOrThrow(TestMapOrBuilder testMapOrBuilder) {
    assertEquals(11, testMapOrBuilder.getInt32ToInt32FieldOrThrow(1));
    try {
      testMapOrBuilder.getInt32ToInt32FieldOrThrow(-1);
      fail();
    } catch (IllegalArgumentException e) {
      // expected
    }

    assertEquals("11", testMapOrBuilder.getInt32ToStringFieldOrThrow(1));

    try {
      testMapOrBuilder.getInt32ToStringFieldOrThrow(-1);
      fail();
    } catch (IllegalArgumentException e) {
      // expected
    }

    assertEquals(TestUtil.toBytes("11"), testMapOrBuilder.getInt32ToBytesFieldOrThrow(1));

    try {
      testMapOrBuilder.getInt32ToBytesFieldOrThrow(-1);
      fail();
    } catch (IllegalArgumentException e) {
      // expected
    }

    assertEquals(TestMap.EnumValue.FOO, testMapOrBuilder.getInt32ToEnumFieldOrThrow(1));
    try {
      testMapOrBuilder.getInt32ToEnumFieldOrThrow(-1);
      fail();
    } catch (IllegalArgumentException e) {
      // expected
    }

    assertEquals(MessageValue.newBuilder().setValue(11).build(),
        testMapOrBuilder.getInt32ToMessageFieldOrThrow(1));
    try {
      testMapOrBuilder.getInt32ToMessageFieldOrThrow(-1);
      fail();
    } catch (IllegalArgumentException e) {
      // expected
    }

    assertEquals(11, testMapOrBuilder.getStringToInt32FieldOrThrow("1"));
    try {
      testMapOrBuilder.getStringToInt32FieldOrThrow("-1");
      fail();
    } catch (IllegalArgumentException e) {
      // expected
    }

    try {
      testMapOrBuilder.getStringToInt32FieldOrThrow(null);
      fail();
    } catch (NullPointerException e) {
      // expected
    }
  }

  public void testPut() {
    TestMap.Builder builder = TestMap.newBuilder();
    builder.putInt32ToInt32Field(1, 11);
    assertEquals(11, builder.getInt32ToInt32FieldOrThrow(1));

    builder.putInt32ToStringField(1, "a");
    assertEquals("a", builder.getInt32ToStringFieldOrThrow(1));
    try {
      builder.putInt32ToStringField(1, null);
      fail();
    } catch (NullPointerException e) {
      // expected
    }

    builder.putInt32ToBytesField(1, TestUtil.toBytes("11"));
    assertEquals(TestUtil.toBytes("11"), builder.getInt32ToBytesFieldOrThrow(1));
    try {
      builder.putInt32ToBytesField(1, null);
      fail();
    } catch (NullPointerException e) {
      // expected
    }

    builder.putInt32ToEnumField(1, TestMap.EnumValue.FOO);
    assertEquals(TestMap.EnumValue.FOO, builder.getInt32ToEnumFieldOrThrow(1));
    try {
      builder.putInt32ToEnumField(1, null);
      fail();
    } catch (NullPointerException e) {
      // expected
    }

    builder.putStringToInt32Field("a", 1);
    assertEquals(1, builder.getStringToInt32FieldOrThrow("a"));
    try {
      builder.putStringToInt32Field(null, -1);
    } catch (NullPointerException e) {
      // expected
    }
  }

  public void testRemove() {
    TestMap.Builder builder = TestMap.newBuilder();
    setMapValuesUsingAccessors(builder);
    assertEquals(11, builder.getInt32ToInt32FieldOrThrow(1));
    for (int times = 0; times < 2; times++) {
      builder.removeInt32ToInt32Field(1);
      assertEquals(-1, builder.getInt32ToInt32FieldOrDefault(1, -1));
    }

    assertEquals("11", builder.getInt32ToStringFieldOrThrow(1));
    for (int times = 0; times < 2; times++) {
      builder.removeInt32ToStringField(1);
      assertNull(builder.getInt32ToStringFieldOrDefault(1, null));
    }

    assertEquals(TestUtil.toBytes("11"), builder.getInt32ToBytesFieldOrThrow(1));
    for (int times = 0; times < 2; times++) {
      builder.removeInt32ToBytesField(1);
      assertNull(builder.getInt32ToBytesFieldOrDefault(1, null));
    }

    assertEquals(TestMap.EnumValue.FOO, builder.getInt32ToEnumFieldOrThrow(1));
    for (int times = 0; times < 2; times++) {
      builder.removeInt32ToEnumField(1);
      assertNull(builder.getInt32ToEnumFieldOrDefault(1, null));
    }

    assertEquals(11, builder.getStringToInt32FieldOrThrow("1"));
    for (int times = 0; times < 2; times++) {
      builder.removeStringToInt32Field("1");
      assertEquals(-1, builder.getStringToInt32FieldOrDefault("1", -1));
    }

    try {
      builder.removeStringToInt32Field(null);
      fail();
    } catch (NullPointerException e) {
      // expected
    }
  }

  // Regression test for b/20494788
  public void testMapInitializationOrder() throws Exception {
    assertEquals("RedactAllTypes", map_test.RedactAllTypes
        .getDefaultInstance().getDescriptorForType().getName());

    map_test.Message1.Builder builder =
        map_test.Message1.newBuilder();
    builder.putMapField("key", true);
    map_test.Message1 message = builder.build();
    Message mapEntry = (Message) message.getRepeatedField(
        message.getDescriptorForType().findFieldByName("map_field"), 0);
    assertEquals(2, mapEntry.getAllFields().size());
  }

  public void testReservedWordsFieldNames() {
    ReservedAsMapField.newBuilder().build();
    ReservedAsMapFieldWithEnumValue.newBuilder().build();
  }

  private static <K, V> Map<K, V> newMap(K key1, V value1) {
    Map<K, V> map = new HashMap<K, V>();
    map.put(key1, value1);
    return map;
  }

  private static <K, V> Map<K, V> newMap(K key1, V value1, K key2, V value2) {
    Map<K, V> map = new HashMap<K, V>();
    map.put(key1, value1);
    map.put(key2, value2);
    return map;
  }

  public void testGetMap() {
    TestMap.Builder builder = TestMap.newBuilder();
    setMapValuesUsingAccessors(builder);
    assertMapValuesSet(builder);
    TestMap message = builder.build();
    assertEquals(
        message.getStringToInt32Field(),
        message.getStringToInt32FieldMap());
    assertEquals(
        message.getInt32ToBytesField(),
        message.getInt32ToBytesFieldMap());
    assertEquals(
        message.getInt32ToEnumField(),
        message.getInt32ToEnumFieldMap());
    assertEquals(
        message.getInt32ToMessageField(),
        message.getInt32ToMessageFieldMap());
  }
}
